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96 suburban AC help please

1K views 10 replies 3 participants last post by  Mudking 
#1 ·
96 454 suburban.

I am frustrated. my AC has been acting up on and off. we just moved back to michigan as you know. The AC worked great for my wife for the move back (thank god).

anyway once we got here it has not worked at all.

It has a brand new compressor/orphice tube/dryer... AC worked when all first installed 2 months ago. NOW, AC has a charge and pressure is over the 47-50 lbs required to make the system work. Clutch wont engage. So I jumped the switch on the dryer. Nothing. jumped the clutch switch. Nothing. Checked all fuses. switched AC relay with starter relay. Nothing.

So we started testing power. at the relay we had power, but it seemed no ground. so, we "grounded the relay" (tying a wire strand to leg of relay installing relay, and grounding it) the Compressor would kick on and would start to blow cold air. weird. The switch doesnt pass ground.

So I tested the switch. I pulled the climate control box out of the dash and it has the 6 legs soldered to the board. I tested those. with switch off 2 legs had 13 volts. when I pressed switch all legs had 13 volts. So it would seem switch is working.

Not real sure where to go from there.

HELP! please... :)
 
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#7 ·
I got that from the Online Chiltons link posted in the General Tech forum. The link that works is toward the end of the thread.

It would have been bigger but I can't access photobucket at work and GL4x4 photos can only be so big.
 
#11 ·
Fixed it. Truck was running and whatever switch in on the back of the compressor itself I grabbed to check continuity and the compressor kicked on and off. So I wiggled it and got it to stay on.

Damn thing. So I guess I just need to tighten up that connection.

Thanks for the help... ac now blows ice cold

Sent from my DROID RAZR HD using Tapatalk 2
 
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